TheLastMillennial

It’s a long story, but I accidentally dropped my Surface Book Pen in the parking lot 3 days ago and only found it today. It’s...

Are you sure you should be taking apart school property? ;) Anyways, you need to remove all the rubber feet on the calculator since there are screws under each of them. Also, I believe there are more screws located underneath the battery. You will need to remove the battery cover, then remove the battery itself, then you should be able to see the screws. Remove those and you should now be able to pry apart the calculator. Could you please tell us exactly what’s wrong with your calculator? It may not require you to disassemble it. EDIT: If your calculator is acting like that then there’s most likely a software issue and (hopefully) not something with the hardware. There are a few things you can try to get the calculator working. (I got this info from TI Planet ) Press the reset button, then hold down the keys: (Some combinations are handled by the boot1 (earliest stage) and cause their effect as soon as the device is (re)starting. Others are handled by the Boot2 and cause their effect when the loading bar is o...

Hi, have you tried pressing the Reset button on the back of the calculator? Your RAM will be cleared but it should fix your issue. If that doesn’t work, I’d suggest looking at the TI-84 Plus CE Calculator Recovery guide.

I don't know if you can even get a new print head anymore, that calculator is over 30 years old! You may be able to get by with cleaning it off though. There's some tutorials on YouTube, one video I found used 99.5% isopropyl alcohol and a tooth brush: https://youtu.be/QWD5iwWl_MI?t=14m34s Hopefully your calculator prints the same way. Unfortunately, I have no idea how to take it apart nor how to get to the head. However, those old machines normally are reasonably easy to disassemble so you can probably figure it out. Sorry I couldn’t help much, however if you run into any problems I’ll still try to help! Just comment to this answer and please share some pictures if you can; pictures can really help diagnose what’s wrong or what needs to be done.

If this only happened right after you cleared the history, then it’s not the display, you just need to do a RAM reset. (Take out the backup battery and one of the AAA batteries. Hold down ON for 10 seconds, then put the backup battery back in lastly, put the AAA battery back in.) It may also help to reinstall the OS. Since that’s a more complex procedure I’ll refer you to this video that explains how to do it. If this has been happening over the course of days or weeks then it’s definitely either display issue or a battery issue. You can try just replacing the batteries but it that doesn’t work then Nick’s answer will help you out.

Adding onto what TheYootx Media Group said, another possible issue is the contrast was turned down too far. You can easily fix this by (make sure the calculator is turned on) repeatedly pressing [2nd] then the up arrow until you can see the display again. If this doesn’t work then it’s either a battery issue or a display issue. If there’s a display issue, then this article may help you repair it.

Hi, thanks for including all that information! I think TI-84 Plus CE Recovery Techniques. is what you’re looking for. Please comment if you still can’t get it working and I’ll keep trying to help! P.S. The charging light is separate from the main calculator software so it can still charge even when the main calculator is frozen or broken.

I hope I'm interpreting your question correctly, but if your screwdriver is too short, then just getting a longer one will work. It does require a T6. Have you tried looking at the disassembly guide? TI-84 Plus Disassembly

Ok we may need a little more information to help you. So is your calculator boot looping? Is it turning on and off repeatedly? Or is is just turning off after you turn it on? Does it keep misbehaving while charging? How long after you turn it on does it take before it turns off again? How long after you turn it off does it take before it turns on again? Does taking the battery out an putting it back in help? Do you have something stuck in your I/O port? (the thing that looks like a mini headphone jack) Does reinstalling the OS help?

I don’t believe it’s a display problem, I’m fairly certain those lines are just from the calculator booting up. However you can test this by taking your calculator (during the time when it refuses to turn on) and plugging it into your computer (Note, you may need to install TI Connect CE). If you computer recognizes that something was connected, then you’re right, it’s most likely a display issue. If you computer doesn’t recognize that something was connected, then it’s a different problem. My guess is there’s a loose connection somewhere under the battery compartment. You can follow this repair guide to take the calculator apart (though you don’t need to take out the motherboard) and see if you can spot any loose or dirty connection points.

To elaborate on Austin’s answer: Not only are they soldered, but even if you have the experience to desolder the RAM and replace it with compatible, better RAM; the calcuator’s operating system couldn’t even utilize it. TI designed the OS to rely on having only 256kb of RAM. The same goes for the Archive storage as well. You wouldn’t get a CPU clock boost either. If you want to increase the speed of your TI 84 Plus CE, there are a few programs that can help. One such program is the Advanced Wait State Change[|r] I wrote that reduces the wait states of the calculator and can make it up to 30% faster.

Are you sure it was the 83 Plus you transferred the internals to or was it the 84 Plus? The 84 Plus uses the same shell design as the 89 and I've never heard of fitting the 89’s internals into an 83 Plus! That's not saying it's impossible though, cool story!

I think you should add the phrase “JBL Spot” somewhere in this guide. Although I searched the web and iFixit, this guide didn’t come up because I was searching for JBL spot rather than JBL spyro.

That moment your recognize your colleague’s dog in the last photo.

P.S. You can buy spare mini USB ports from sites like Amazon or Ebay.

Hey louis liu, I updated this guide with a link on where to buy the battery. It cost about $12 USD on Amazon: http://a.co/d/iTK2V0v

Fine, it’s your guide. :)

Hey @ajcooke01 I noticed you changed the images back to the old TI Connect. I’d like to know why since I believe people should really move away from the old TI Connect and use the new one. The new one still works with the TI 84 Plus and is a heck of a lot faster and easier to use; especially for new people. I really think this guide will benefit from people using the most recent TI Connect since it has better community support and is easier to use.

Jeez this needed a lot of work to fix! But I think I made it into a much better, more robust guide. It’d be great if you’d post this in the correct TI 84 Plus Device page. Also, please do more research about your guides and pages before posting them. People like *quality* guides, they don’t care if you’re pumping out tons of low quality, duplicate, or poorly researched pages. ;-)

I don’t believe you can buy the motherboard anywhere. However you can salvage them out of other damaged calculators.